Welcome to the Exergoecology Portal
You are here: Home / Resources / Exergoecology bibliography / Recycling of discarded mobile printed circuit boards for extraction of gold and copper

Amit Barnwal and Nikhil Dhawan (2020)

Recycling of discarded mobile printed circuit boards for extraction of gold and copper

Sustainable Materials and Technologies, 25.

This study investigates the recycling of mobile printed circuit boards through physical treatment followed by hydrometallurgical processing. Copper dissolution of the feed and processed fractions using different lixiviants were studied. Fluidization provided an effective separation of metallic values, and 88% carbon removal were observed. The ferrous fraction was separated using a low-intensity magnetic separator. Cu and Au dissolution in the treated sample was many folds higher compared to the feed sample. The acid consumption for the treated fraction is quite low compared to the feed sample 44–45 ml / g. It was found 75% extraction efficiency with a purity of 97% Cu was extracted using electrodeposition. Au was successfully precipitated from leach solution using urea, followed by sodium bisulfite. Finally, it can be concluded 4.1 g Au and 9 kg Cu can be recovered from 10 kg treated mobile printed circuit boards.

Copper, Fluidization, Gold, Leaching, Mobile PCB

Document Actions


Please subscribe for the new newsletter.

Logo instituto Circe
Ministerio de Economía y Competitividad
Ulysea S.L. - Informática

The Material Limits of Energy Transition: Thanatia

Antonio Valero Capilla, Alicia Valero Delgado and Guiomar Calvo

This book provides a holistic view of raw mineral depletion in the context of renewable energy transistion.

The material limits Thanatia


Thanatia. Los límites minerales del planeta

mites minerales del planeta

 Antonio Valero Capilla and Alicia Valero Delgado interviewed by Adrián Almazán

We need a material transition, not only energetic, that restores nature and effectively reuses materials. Gaia must be cared for by extending life on Earth and slowing its degradation towards Thanatia.

Thanatia los limites


Thermodynamics for Sustainable Management of Natural Resources

Cover Thermodynamics

Wojciech Stanek (Editor)

This book examines ways of assessing the rational management of nonrenewable resources. Integrating numerous methods, it systematically exposes the strengths of exergy analysis in resources management.

Thanatia: The Destiny of the Earth's Mineral Resources

Cover Thanatia

A Thermodynamic Cradle-to-Cradle Assessment by (author): Antonio Valero Capilla and Alicia Valero Delgado

Is Gaia becoming Thanatia, a resource exhausted planet? For how long can our high-tech society be sustained in the light of declining mineral ore grades, heavy dependence on un-recycled critical metals and accelerated material dispersion? These are all root causes of future disruptions that need to be addressed today.